That's not true at all. There are many advertisements/sponsorships within large YouTube creator channels now. It's regularly 1min or more in every 10min of video. I don't mind so much, because they are skippable and since it's the creators themselves rather than totally unrelated garbage.
They're not ads that are controlled by Google/YouTube, so I guess I'm able to view them as pragmatically different. They also don't bother me much because they're generally presented by the content creator that I'm interested in watching, rather than being completely unrelated.